Global Patent Index - EP 0411661 A3

EP 0411661 A3 19920902 - DOT CRAWLING INTERFERENCE ELIMINATION DEVICE AND COLOR SUBCARRIER VERTICAL CORRELATION DETECTION DEVICE

Title (en)

DOT CRAWLING INTERFERENCE ELIMINATION DEVICE AND COLOR SUBCARRIER VERTICAL CORRELATION DETECTION DEVICE

Publication

EP 0411661 A3 19920902 (EN)

Application

EP 90114977 A 19900803

Priority

JP 20326589 A 19890804

Abstract (en)

[origin: EP0411661A2] A dot crawling interference elimination device and a color subcarrier vertical correlation detection device, which comprise a color subcarrier vertical correlation detection device (10) for a video signal, an adaptive three-dimensional Y/C separation unit (9), and an adaptive notch filter (14) of a color signal band, detect vertical correlation of a color subcarrier in a non-standard signal, such as a signal reproduced from a home VCR or a special signal reproduced from an optical VDP system, that does not strictly meet the standards of the NTSC system or the PAL system, thereby to discriminate non-standard characteristics of the signal, and eliminate a color signal component, which mixes into a luminance signal when a motion-adaptive Y/C separation is carried out for the non-standard signal, by using an adaptive notch filter that suits a non-standard state of the input image signal.

IPC 1-7

H04N 9/64

IPC 8 full level

H04N 9/64 (2006.01); H04N 9/79 (2006.01)

CPC (source: EP KR US)

H04N 9/45 (2013.01 - KR); H04N 9/64 (2013.01 - KR); H04N 9/646 (2013.01 - EP US); H04N 9/7908 (2013.01 - EP US)

Citation (search report)

  • [X] EP 0137994 A2 19850424 - SONY CORP [JP]
  • [Y] US 4739390 A 19880419 - ACHIHA MASAHIKO [JP], et al
  • [Y] PATENT ABSTRACTS OF JAPAN vol. 13, no. 168 (E-747), 21 April 1989; & JP-A-64 001 389 (HITACHI) 05 January 1989
  • [X] PATENT ABSTRACTS OF JAPAN vol. 13, no. 16 (E-703), 13 January 1989; & JP-A-63 221 792 (VICTOR CO OF JAPAN) 14 September 1988
  • [XP] PATENT ABSTRACTS OF JAPAN vol. 13, no. 359 (E-804), 10 August 1989; & JP-A-1 117 592 (MATSUSHITA ELECTRIC) 10 May 1989

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0411661 A2 19910206; EP 0411661 A3 19920902; EP 0411661 B1 19980211; DE 69032032 D1 19980319; DE 69032032 T2 19980903; JP 2523886 B2 19960814; JP H0366285 A 19910320; KR 910005695 A 19910330; KR 930004830 B1 19930608; US 5155582 A 19921013

DOCDB simple family (application)

EP 90114977 A 19900803; DE 69032032 T 19900803; JP 20326589 A 19890804; KR 900011380 A 19900726; US 55906690 A 19900730